Common materials used in thermoforming include polystyrene (PS), polypropylene (PP), and polyvinyl chloride (PVC). Each material has different properties and is chosen based on the intended use. Polystyrene is widely used in food packaging due to its low cost and easy processability. Polypropylene is preferred in automotive parts and home appliance production for its durability and chemical resistance. Polyvinyl chloride, on the other hand, is used in industrial applications for its high chemical resistance and strength. Additionally, the recyclability of materials used in thermoforming provides a significant advantage for eco-friendly production processes.